Welding or cutting torch.



A; c. MGEE. WELDING 0R CUTTING TORCH. APPLICATION FILE-D DEC. 27.1915- Patentedl .19,191&

` ATTO/mfr p any ci a plurality Anrnuza c. Moens, or onA'rHn,

KANSAS, ASSIGNOB TO ECONOMY 'WLDING MACHINE COMPANY, OF KANSAS CITY, MISSOUFI, A CORPORATION OF MISSOURI.

WELDING on CUTTING Torten.

VSpeeiilcation of Letters Patent.

.` Application med December 27,;1915. Serial No. 68,727.

To all whom it may concern.'

Be it known that I, ARTHUR Olathe, in the county of Johnson and tate ot Kansas, have invented certain new and useful Improvements in Weldin or Cutting Torches; and-I do declare the be a full, clear, and exact-descriptionof the invention, such as will enable others skilled in the art to which it appertains to make and reference being had to the aoand to the letters and which use the same, con'ipanying drawings, gures of reference marked thereon, form a part ot this specication.

liiy invention relates to torches of the oxyacetyl'ene type, and more particularly to a device ci that character that may be used 'for either welding or cutting certain metals; 'the principal object ot the invention being 'to provide a torch that may be used with of f interchangeable tips, to :facilitate use oi the torch under variable conditions, and wherein the tips may be easily and. quickly applied to or removed roin the torch body.

Torches oi this character are used principally tor welding or cutting iron or steel, and more particularly in repairing castings, parts oi machinery, etc. As the objects to he welded are frequently associated in asseinhled machines, and whether so assembled or in detached pieces are frequently diicult ci access or arranged in di'erent positions, oi diderent length and shape must be used to properly apply the gases to the work, and as cutting requires a tip troni which a jet oi pure oxygen may be delivered close to a welding jet or flame, it is necessary to not only provide tor interchange of tips but also 'to provide for supplying the pure oxygen 'to the tip Jtor coperating with the welding jet or haine.

t is, therefore, a further object of the invention to provide for proper supplypf the pure oxygen and its yproper combination with the oxy-acetylene jet. l

In accomplishing these and otherobjects et" the invention I have provided improved details of structure, the preferred forms of which are illustrated in the accompanying drawings, wherein Figure I is an elevation of a welding and cuttin torch constructed according to mv invention, showing the torch equipped with ollowing to a cuttingtip, and illustrating the nieansfor C. McGm a citizen of the United States, res1din at supplying pure oxygen to the tip.

Fig. II is a same.-

Fig. III isa detail view of a welding tip vwhich may be used with the torch.

Fig. IV is an enlarged longitudinal4 sec- Patentea Mar. i9, 1918'. y

longitudinal section of the n.

tion ofthe connection of the pure oxygen conduit with the main oxygen supply tube.

Fig. V is an enlarged longitudinal section o a cuttin torch, illustrating its connection with t e acetylene and pure oxygen supply members.

Referring more in detail to the drawings:

1 designates a casing which may be of sufd icient diameter to Ytorna a convenient han` dle for the torch, and extending through the casing is a pipe 2, having ahead ,3 at its outer end, provided with a screw-threaded nipple 4 and having a screwthreaded inner end 5 that is adapted for connection with an acetylene supply tube 6. Extending through the pipe 2, and preferably entering. the 'saine within the casing, is a relatively small pipe 7, the outer end of which terminates at the end of the nipple 4 and the innerl end of which extends through the inner end of the casing. The inner ends of the pipes 2-7 vextend through apertures 8--9 at the inner end of the casing and carry valveittings 10-1l the hollow boss 22 to effectively seal the boss and prevent the escape of gas.

The tip 23 that is illustrated in Figs. I, II and V is one especially adapted for cutting, as distinguished from welding, in that it comprises, in addition to the welding element, means for supplying pure oxygen for 'oxidizing the'metal after it has been melted by the welding jet to effect cutting, the interchangeable features O the tip being the saine. however, as those of any tip, such as is shown in Fig. III.

l same directly tially until l head 27 of the tip, While any suitable welding tip, Such asv The tip proper comprises a cylindrical body 26, that carries the boss 22, so that its channel'opens into the cylinder between the ends thereof; the inner end of the cylinder of the cutting tipY being closed by a suitable head, such as the head 27 shown in Figs. I-, II and V of the drawings, and which corresponds with the head 27 of the welding tip shown in Fig. III, the outer end of which is closed by a plug 28 corresponding to the plug 28 of the Welding tip but having converging openings 32 therein through which the mixed gases are delivered in a conical jet that may contact the work at its apex so that the welding jet or iiame may be applied over a very restricted area.

As any mixture of free air with the weld-Y in gases, 'within the torch, would seriously a ect the eiiiciency of the torch, I provide for sealing the tip, preferably by brazing the and plug 28 in the respective ends to form air tight joints.

that shown in Fig. III, may be used with the body vof the torchand the tips changedby means of the coupling which has been heretofore described, a tip of diflerentstructure and such as shown in Figs. I, II and V, is required for cutting, as it is necessary in this operation to follow the jet of mixed oxygen and acetylene with a jet of pure oxygen in order to oxidize the meta! after it has been melted and in this Way secure removal of material from the kerf by disintegration or burning.

In order that theoxygen jet may be applied to the material as quickly as possible after the material has been primarily melted by the weldngjet, and thereby avoid acooling interval and insure a thin, sharp kerf, I project the oxygen jet concentrically of the weldino" jet so that it will follow the and thereby effect the xidization While t e metal isy in proper condition.

To besteffect the result desired and also form proper1 I d h o en supp y, rovi et e cutting tip 23Kgheretofore deszribed, which is interchangeable with the weldin tip bymeans of the hollow boss 22, coup mg nut 21 and conduit 20,but wherein the head 27 is connected with the plug 28 by a tubular body 31, the bore of which extends through the plug so that a jet therefrom will deliver through the apex of the welding jet, and which communicates at its opposite end with a chamber 32 in an elbow 33 of said head.

Asthe ure' oxygen jet is not used inithe metal to be cut has been melted by the. welding jet, I provide for separate control of-the jets, whileutilizing a minimum number of parts by opening the pure oxygen conduit 37 d1rectly to the mainsupply, but providing itwith a con- .of oxygen to the mixing connection with aV source of` same so that the metal is removed to the kerf cleared and allow the welding jet preferably located adJacent the handle cas-- ing 1 so that it may be manipulated by the operator, the iow in the mixture conduit being controlled by the valve 13 inthe fitting l1. f

Assuming/that the parts are constructed and assembled as-described, when the torch is to berused for welding, as distinguished from cutting,.a suitable welding ti is applied to the torch and acetylene an oxygen gases are admitted to the pipes 2'-7 through the tubes 6-17, and pass to the mixing chamber 19 at the ends of said pipes, the flow through the pipes being controlled by the valves 12-13/of the fittings 10-11. The gases passing separately throughthe casing and s y chamber, where they mix and are forced outwardly through the restricted orifice in the tip ontoA the work to be done, s o that the ame that is present when the been ignited -is directed onto the work in a oint of restricted area. Y

hould it be desired to use the torch for cutting, the welding torch is removed by unscrewing the couplin 21. The cutting tip is then applied to t e torch by means of the coupling1 nut,l as in the case of the welding tip. he oxygen supply pipe 17 is disconnected from the fitting 11 vand the T 39 of the pure oxygen conduit 37 is attached to the fitting b means of the cou- -ph'ng nut 42 and the tu e'17 attached to the nipple 44 of said T. The outer end of the conduit 37 is then attached to the tip head by means of the coupling nut 38 to complete the connection between the tip and oxygen supply tube.

The pure oxygen supply conduit connects directly with the main oxygen supply tube 17 but the valve 46 is automatic to close the flow of pure oxygen to the tip so that flow chamber and for the cutting jet may be controlled independently. When the cutting is to be performed oxygen and acetylene gases are delivered to the vmixer and from the conical outlet onto the Work so that the metal is melted at the livered onto the molten metal. Pure oxygen having an affinity for iron and steel oxidizes the metal and disintegrates or burns the keep to continuously attack fresh metal, the oxidizing jet following the welding jet closely to eliminate the metal in the kerf as the welding jet proceeds.

When the cutting is finished the cutting tip may be removed and replaced with a suitable welding tip if desired.

ank are delivered into the commonl gases have invention,` what Having thus described'm7 d esire to secure I claim as new therein an by Letters-Patent, is:

1n a .torch of the character described, con- 5 duits, one inclosing the other, a mixing chamber mounted on the end of the .inclosing conduit, a tip having a hollow boss thereon provided with a tapered mouth, a

conduit lprojecting from the end of the mix- 10 ing chamber, having a boss tapered at one end to t within the mouth of the tip boss and a shoulder at the opposite end2 and' a. coupling nut having a ead engaging the shoulder on said conduit boss and a body part inclosing and threaded onto, the end of the tip boss to mount the tip on said mixing chamber and seal the connection therebetween.

' In testimony whereof I afx my signature.

ARTHUR C. MGGEE. 

